Tions electriques



(No Model.) 2 Sheets-Sheet 1. L. A. BERTHON. RBSTORING SYSTEM FOR ANNUNGIATORS.

Patented Sept. 12, 1893.

"M T N E V N Irma-sass:

(No Model.) 2 Sheets8heet 2. L. A. BERTHON. RESTORING SYSTEM FOR ANNUNCIATORS.

Patented Sept 12, 1893.

/////////vr/ O UNITED STATES PATENT QFFICE.'

Louis AIFRED BERTHON, or PARIS, rnnnon, ASSIGNOR 'ro THE sooinrn eEnERaLn nns 'rnnnrnonns, (RnsEAUX 'rnnn'rnonrouns ET CONSTRUC- TIONS ELECTRIQUES.)

RESTORING SYSTEM FOR ANNUNCIATORS.

SPECIFICATION forming part of Letters Patent No. 504,797, dated September 12, 1893. Application filed May 1'7, 1898. Serial No. 474,546. (No model.) Patented in France January 31, 18931 1 To in whom it may concern: dicator which is above, and the indicator for Be it known that I, LOUIS ALFRED BER- the end of the conversation, or stop indicator, TiiQN, a citizen of the Republic of France, rewhich is below. Fig. 3 isa fragmentary axial siding in Paris, France, have invented certain section of a solenoid for restoring the shutter.

new and useful Improvements in Systems of Fig. 4 is a front elevation thereof. Fig. 5 is Electrically Raising Shutters of Telephonea rear elevation thereof. Fig. 6 is a plan Indicators, (which invention has been patview of the core thereof detached. Fig. 7 is' ented in France, dated January 31, 1898, No. a cross-section thereof. Fig. 8 is an under 227,507,) of which the following is a specifi side plan view of the key-board or switches Cal510{1- for the solenoids. Fig. 9 is a transverse sec- This invention relates to telephonic eX- tion thereof. changes and has for its object an improved Referring to the drawings, I will now desystem for electrically operating the indicator scribe the preferred adaptation of my invenshntters in such exchanges without requiring tion.

I 5 the operator to act manually upon the shut- Let A indicate the callindicator as awhole, llldicator. A the stop indicator as a whole, S the solen- In carrying out the invention in its preoid for restoring the former, and S an idenferred form, I provide in connection with the tical solenoid for restoring the latter, M conusual call shutter or indicator, or the usual ductors constituting part of an electric cir 2o stop shutter or indicator, or with both, cercuit between any suitable battery and the tam improvements in mechanical and electrosolenoids, and N an electric switch controlmagnetlc means, as an electro-magnet or solenling communication through said conductors, 01d, operating when actuated by an electric and thereby the operation of said solenoids. current to restore the shutter to the closed I will now describe in detail the features of 2 5 position; and I provide an electric switch for construction and operation of the adaptation controlling the current actuating such magof my invention shown in the drawings. net or solenoid, one such switch being pref- The axis of the shutter is a steel pin ahaverably provided for each subscribers circuit, ing at its end a shoulder and conical head 6. and each such switch being preferably 10- The body of the pin is held by strong fric- 3 cated in proximity to or immediately under tion in, or is forced into, the two parts 0 c of the usual spring-jack of the circuit of the the plate 6, which latter is fixed on the front subscriber to which its indicator corresponds, plate X, but it is. free in the parts ff of the and constructed to be operated by the usual shutter 2' thus forming a hinge therefor. A contact plug of such spring jack. By this grooved pulley h, over which runs a small 3 5 provision the operator is enabled to speedily chain :0, is mounted on the end part b, of the restore or raise the call shutter by operating pin a free to turn thereon but held in posiits restoring switch with the end of the springtion by the conical head thereof. This pul jack plug just before inserting the latter into ley has a stud j which forms a stop against the spring-jack of the subscriber circuit, and the plate X when the shutter falls, and an- 0 again to restore the stop shutter in like manother stud 70 (Figs. 1 and 2) which serves to nor immediately afterwithdrawingthe springraise the shutter i. The stud j is not necesjack plug, thereby greatly facilitating and sary, however, and maybe omitted if desired. expediting the work of the operator. The action of the chain :0 which passes over In the accompanying drawings which illusthe small pulley h, an action which causes 45 trate the preferred adaptation of my inventhe raising of the shutter, is produced elec- 5 tion, Figure l is a front elevation of an inditrically by means of solenoids which may be cator shutter furnished with appliances for arranged horizontally or vertically. The raising it electrically. Fig. 2 is a side view horizontal arrangement is preferable as being in section showing together the two indicamore simple and less inconvenient, and yet 50 tors of a subscriber, that is to say, the call inall parts of the system can be easily disroo mounted; as will be seen, the solenoids are independent of one another, so that any one can be replaced if required without troubling the others. Fig. 2 shows the arrangement with horizontal solenoids. Each call indicator Aand each stop indicator A has a corresponding solenoid S and S, shown separate in section by Fig. 3 and end view Fig.4; each solenoid has a central copper tube B which serves as a guide to the soft iron core O. This core, shown separately in plan by Fig. 6, and in transverse section Fig.7, is arranged as a carriage having two soft iron rollers D D held in forks E E cut in the soft iron of the core.

To the core Ois attached bya plug g the chain as, the other end of which after passing round the pulley h is attached to an opposing spring F, which is attached to an adjusting screw G passing freely through holes in the plates of support H H at each end of the solenoid, this screw being strained more or less by the nut I. The small screw Z (see the end View Fig. 5) serves to guide or set the adjusting screw G.

The current is sent into the solenoid S of the indicator which has to be raised by means of suitable switches or keys within reach of the operators hand. Figs. 8 and 9 show the arrangement in transverse section and in plan. It preferably consists of a band V of ivorine in which are imprisoned copper dowels m m, to each of which are soldered two spring blades 0 0 embedded in the ivorine. The dowel is by the addition of those springs held firmly in the ivorine, but for greater security two screws v o are added, which insure a perfect fixture of the dowel. To the two springs 0 0 is fixed, by screws 1) '2), a copper block J, having a hole which serves as guides to a metal rod p, which is integral with a rectangular copper piece q lodged in the dowel m and sliding with slight friction therein. The exterior face of rod 10 is hollowed at a to the same shape as the end of the usual spring jack plug '1'. A helical spring 8 surrounds the rod 19 and has its one end held by a setscrew 25 in the block J, its other end engaged in a hole q in g, which latter with its rod 1) forms a plunger. The inner rod of 19 stops on its inward movement against a screw u lodged in a copper piece K. These parts constitute a switch N, which is closed to complete electrical communication between a battery and the solenoids corresponding to this switch, when the rod or key 19 is pushed into contact with the stop screw 'Lb. These copper'pieces are also imprisoned in the ivorine. On the piece K are finally screwed two bent blade springs 11 y. The spring blades 0 and 'y extend between two spring blades 2 z in the connecting band L, and itis to these latter blades that the electrical conductors from the battery to the solenoids are soldered. Each band V holds as many dowels m as there are spring jacks in a band of the same size.

To each spring jack corresponds a dowel m, two springs o, a piece q, a block J, a block K and two springs y y. The thickness of the band is the same as that for the spring jacks.

The operation is as follows: \Vhen a subscriber causes the shutter of his indicator to fall, the operator, before inserting the plug in this subscribers jack to answer him, pushes the plug into the dowel m, which action pushes the plunger 1) inward, which comlngin contact with the screw ucloses the circuit of the solenoid arranged to raise the corresponding shutter. The operator then withdraws the plug and inserts it in the subscrlbers ack, which may be immediately above the dowel. This action is therefore very simple and insures good working. 0

It will be seen that my inventlon provides an improvement in telephonic exchanges which can be variously availed of, and it will be understood that the invention is not limited to the precise details of construction and arrangement set forth as its preferred form, as these may be modified as circumstances dictate without departing from the essential features of the invention.

What I claim is 1. In a telephonic system, a movable indicator in combination with an electro-magnet for restoring said indicator when actuated, an electric circuit for supplying an electr c current to said magnet, an electric switch in said circuit controlling communication therethrough, and a pulley operated by said ma net and engaging said indicator to move it to the restored position, whereby the operator can restore said indicator by operating said switch.

2. In a telephonic system, a movable indicator in combination with an electro-magnet for restoring said indicator when actuated, an electric circuit for supplying an electric current to said magnet, an electric switch controlling the current through said circuit, and a pulley operated by said magnet and hav ng a stud engaging said indicator and restoring it when operated by said magnet.

3. In a telephonic system, an indicator having a swinging shutter, in combinatlon with a rotative pulley adjacent thereto having two studs, one acting to stop its rotation and the other engaging the shutter elastically and moving it to the restored position.

4. In a telephonic system, an indicator having a swinging shutter, in combination with a rotative pulley engaging this shutter and moving it to the restored position, a chain passing over said pulley and operating it, and a solenoid operating said chain.-

5. In a telephonic system, an indicator having a swinging shutter, in combination with a rotative pulley engaging this shutter and moving it to the restored position, a chain passing over said pulley and operating it, a solenoid operating said chain to move said pulley toward the restored position, and a spring operating said chain in the reverse direction.

6. In a telephonic system, an indicatorhaving a swinging shutter, in combination with a solenoid for restoring said shutter having a central tube, a core having rollers moving in said tube, a chain actuated by said core, and a pulley engaging said shutter and moved by said chain to restore the latter.

7. In a telephonic system, an indicator in combination with a solenoid for restoring the same, electric conductors for supplying a current to said solenoid, and a switch connected to said conductors and consisting of a sliding 15 piece pressed out of contact by a spring and adapted to be pressed into contact to close said circuit by the operators plug.

In witness whereof I have hereunto signed my name in the presence of two subscribing 20 witnesses.

LOUIS ALFRED BERTHON.

Witnesses:

J ULES ARMENGAUD, J eune, RoBT. M. HOOPER. 

